According to Grunt, it begins to degrade immediately. I wouldn't prepare them more than a few hours before use.

agreed. im assuming you will be pinning right after your workout. you reconstitute the lyophilized powder with acetic acid, and then immediately before your wokout you fill the syringe with the igf, then you draw some bac water into the syringe to dilute the AA so it doesnt burn.

best case scenario is you have the igf in a syringe, then you dilute with the bac water immediately before u pin, but thats not always feasible if ur pinning in the stall of ur gym's lockerroom.